The Chelsea 871 Series Power Take-Off, part number 871XAFJP-B3BC or 871XAFJPB3BC, is a 10-bolt PowerShift (hydraulic shift) PTO designed for Allison transmissions. The 871 Series delivers continuous torque capacity up to 670 lb-ft (908 N-m) with no derating required for continuous-duty applications, and shaft power of 64 HP at 500 RPM or 128 HP at 1,000 RPM. Nine speed ratios and thirteen output options give technicians wide flexibility across fire and rescue, refuse, pumper/cleaner, and truck crane applications. The compact housing reduces clearance issues common in tight installations. The 871 Series replaces the earlier Chelsea 870 Series and is the only Chelsea PTO to combine Wet Spline, SmartStart, and Quiet Gear options in one platform. Call us to confirm proper fit for your specific transmission and application.
The Chelsea 871 Series supersedes the 870 Series PTO. Key upgrades include the ductile iron bearing cap and the revised O-ring sealing configuration, both introduced to address vibrational loads from current and future engine designs. The 871 Series is the only Chelsea PTO platform to offer all three premium options simultaneously: Wet Spline (extends PTO and pump shaft service life), SmartStart (reduces shock load at start-up), and Quiet Gear (reduced input noise). Electronic Overspeed Control (EOC) is also available to protect driven equipment. Applicable markets include fire and rescue, truck cranes, pumper/cleaner, and refuse. Refer to Parker Chelsea application pages to confirm the actual torque rating for your specific installation. Parker reference documents: 871 Series Parts List HY25-2871-M1/US; 267/281/288/871/878 Series Owner's Manual; 871 Series Sales Literature.
Features
10-Bolt PowerShift (hydraulic) mounting for Allison transmissions
Continuous torque capacity up to 670 lb-ft / 908 N-m, no continuous-duty derating required
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios including low and high speeds; thirteen output options
Wet Spline pump flange, SmartStart, Quiet Gear, and Electronic Overspeed Control (EOC) options available
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Manufacturer: Allison
- Continuous Torque: 670 lb-ft / 908 N-m (verify actual rating on application pages)
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1,000 RPM
- Speed Ratios: Nine (includes low and high)
- Output Options: Thirteen
- Output Shaft Types: SAE B (7/8 in. - 13T) Pump Spline, SAE BB (1 in. - 15T) Pump Spline, SAE C (1-1/4 in. - 14T) Pump Spline, DIN 5462 Pump Spline, 1410 Series Companion Flange, DIN 120 Flange, DIN 100 Flange
- Output Flange Types: SAE B Pump Flange, SAE C Pump Flange
- Lubrication: Pressure Lube and Wet Spline
- Continuous Operation: Yes
- NMFC Code: 125820 (Hydraulic PTOs, Pumps, Motors)
Additional Information
The Chelsea 871 Series supersedes the 870 Series PTO. Key upgrades include the ductile iron bearing cap and the revised O-ring sealing configuration, both introduced to address vibrational loads from current and future engine designs. The 871 Series is the only Chelsea PTO platform to offer all three premium options simultaneously: Wet Spline (extends PTO and pump shaft service life), SmartStart (reduces shock load at start-up), and Quiet Gear (reduced input noise). Electronic Overspeed Control (EOC) is also available to protect driven equipment. Applicable markets include fire and rescue, truck cranes, pumper/cleaner, and refuse. Refer to Parker Chelsea application pages to confirm the actual torque rating for your specific installation. Parker reference documents: 871 Series Parts List HY25-2871-M1/US; 267/281/288/871/878 Series Owner's Manual; 871 Series Sales Literature.
Parts Manual: Chelsea 871 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
